Sanitary napkin

Details Sanitary napkin Sanitary napkin

1999-05-14

2001-10-02

Lewis, Aaron J. (Department: 3761)

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

C604S385030, C604S385160

Reexamination Certificate

active

06296628

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to sanitary napkins or menstruation pads for absorption and containment of body exudates.
Sanitary napkins are usually worn by fastening a adhesive zone provided on a bottom surface of the napkin to a crotch region of an undergarment worn by a wearer.
The known napkin tends to slip down as the undergarment slips down and consequently the napkin is spaced from the wearer's vaginal orifice and the vicinal area. This may often cause undesirable leakage of body exudates.
SUMMARY OF THE INVENTION
In view of this problem, it is an object of the present invention to provide a novel sanitary napkin adapted to eliminate leakage of body exudates due to the foregoing cause.
According to the present invention, there is provided a sanitary napkin comprising a first member including a liquid-pervious topsheet, a liquid-impervious backsheet and a first liquid-absorbent core disposed between the topsheet and the backsheet and a second member including a substantially liquid-pervious and elastically stretchable/contractile sheets and a second liquid-absorbent core occupying a central zone of the second member and covered with the elastically stretchable/contractile sheets, wherein: the first and second members respectively have a longitudinal direction extending between front and rear end portions thereof and a transverse direction extending between opposite side edge portions, the second member being placed upon and joined under tension in the longitudinal direction to an upper surface of the first member at the respective front and rear end portions.
According to an embodiment of the present invention, the opposite side edge portions of the first member extend outward beyond the corresponding opposite side edge portions of the second member. In this embodiment, the second member has an elongation percentage of 5~50% and a contractile force of 11.8~196.9 g/cm both in the longitudinal direction. Preferably, the presence of the second core causes the central zone of the second member to protrude upward.


REFERENCES:
patent: 4425130 (1984-01-01), DesMarais
patent: 5599337 (1997-02-01), Mccoy
patent: 5695324 (1997-12-01), Weirich
patent: 5702375 (1997-12-01), Angelillo et al.
patent: 5743896 (1998-04-01), Parker
patent: 5853401 (1998-12-01), Mayer et al.
patent: 5873869 (1999-02-01), Hammons et al.
patent: 0606082 (1994-07-01), None
patent: 0904755 (1999-03-01), None

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